Krnjača (Serbian Cyrillic: Крњача, pronounced [kř̩ɲat͡ʃa]) is an urban neighborhood of Belgrade, the capital of Serbia.

Through Dunavski Venac, Krnjača makes an urban connection to Borča on the north and through Reva on the east, it stretches all the way to Pančevo.

In his plans, Doxat envisioned the proper, star-shaped fortification on the location of modern Krnjača, across the Belgrade.

Despite the maps printed with the existing fortification, the ramparts in the swamp were never built, though some works on the construction were conducted.

Being scattered, Krnjača has many sub-neighborhoods, like Dunavski Venac, Reva, Kotež, Kožara, Mika Alas and a cluster of blocks in its central part.

To the west it is bordered by the neighborhood of Reva and to the south by the embankment on the Danube and the entire area is often flooded.

The facilities of Belgrade's brewery of Beogradska industrija piva or BIP are located in the western part of the neighborhood, along the Zrenjaninski put.

It is the most industrialized part of Krnjača as here begins the series of factories, hangars, workshops and storehouses which stretch all the way to Pančevo.

The main facilities are: Janko Lisjak, Progres, Politika's printing-house, Balkan, Dom, IMK Beograd, etc.

It is a residential area, with two important facilities: stadium of the Palilulac soccer club in the extreme west and new Metro megastore in the east, along the Zrenjaninski put.

Sibnica is the easternmost extension, disconnected territorially from the western urbanized part of Krnjača, reaching the Timiș river.